Educators, Scout Leaders, and Youth Group Leaders alike will appreciate the economy of the bulk packs we offer. Bulk packs of rocket kits come in two sizes: 12 rockets or 24 rockets, depending on the rocket you choose. All the parts and instructions you need come packed in one box to allow leaders to conduct group projects. Bulk packs of rocket engines come with 24 engines, recovery wadding, igniters/starters, and plugs.